Sumac Lemon Lean Beef Slow Cooker Tomato Spinach Soup
Slow cooking lean beef sirloin in a base of crushed tomatoes and beef broth gives the meat ample time to become tender without breaking down completely. Ground sumac brings a gentle, earthy tartness that melds into the rich tomato base, creating a distinct flavor profile from standard beef soups. Adding fresh lemon juice and tender baby spinach right at the end keeps the final bowl bright and visually vibrant, using the pot's residual heat to soften the greens gently without overcooking them.
Why this one works
- Hands-off slow cooking allows lean beef sirloin to turn tender over six hours.
- Ground sumac adds a nuanced, tangy depth that complements the crushed tomatoes.
- Baby spinach wilts gently in residual heat, preserving its color and fresh texture.
- Fresh lemon juice balances the rich, savory broth right before serving.
What you’ll need
- 1.5 lbs (680g) lean beef sirloin, cubed Cut into uniform bite-sized pieces so the meat tenderizes evenly throughout the slow simmer.
- 28 oz (800g) crushed tomatoes Provides a thick, textured base that holds up well over several hours of gentle cooking.
- 2 cups (475ml) beef broth Thins the tomato base into a balanced, spoonable soup consistency.
- 1 tbsp (15g) ground sumac A deep red spice that imparts a mild, tart berry-like flavor to the broth.
- 2 tbsp (30ml) fresh lemon juice Stirred in at the very end to add fresh acidity and lift the deep savory flavors.
- 3 cups (60g) fresh baby spinach Folded in during the final moments so it wilts immediately without turning dull or overly soft.
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What to have nearby
- Slow cooker (4-quart or larger)
- Cutting board and chef's knife
- Liquid measuring cup
- Ladle or large serving spoon
Step-by-step instructions
The preparation requires minimal active effort: combine the beef, liquids, and sumac in the slow cooker base, then let low heat do the work. The only finishing step is stirring in the citrus and tender greens just before ladling into bowls.
- 1Step 1
Place the lean beef cubes into the slow cooker.
- 2Step 2
Add the crushed tomatoes, beef broth, and sumac.
- 3Step 3
Cook on low for 6 hours until the beef is tender.
- 4Step 4
Stir in fresh lemon juice and baby spinach just before serving, allowing the spinach to wilt in the residual heat.
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A few things worth knowing
- Keep the slow cooker lid firmly closed during the six-hour cook to maintain steady heat and moisture.
- Trim any heavy exterior gristle from the sirloin while cubing to ensure every piece is pleasant to eat.
- Stir in the spinach and lemon juice immediately before serving so the greens retain a vibrant green hue.
Ways to make it your own
- Dust a pinch of extra ground sumac over each bowl just before serving for added color.
- Serve with fresh lemon wedges on the side for diners who prefer extra acidity.
Serving suggestions
Ladle the hot soup into wide bowls alongside warm flatbread, pita, or a loaf of crusty sourdough for dipping into the spiced tomato broth. A crisp side salad with cucumbers and fresh herbs complements the citrusy notes nicely.
Storage & reheating
Allow leftover soup to cool before transferring to a sealed container in the refrigerator. Reheat gently on the stovetop over low heat until warmed through to keep the lean beef tender.
Nutrition notes
Nutrition is provided as a general estimate for the listed recipe. Brands, exact portions, and ingredient swaps can change the numbers.
Quick recipe answers
Why is the spinach added at the very end?+
Baby spinach is delicate and wilts in seconds from the residual heat of the soup, which prevents it from overcooking or turning dull.
Can ground sumac be omitted?+
Sumac provides the signature tart, earthy undertone in the broth, so keeping it in the recipe is key to the intended flavor.
Why is sirloin specified rather than stew beef?+
Lean sirloin provides clean, beefy flavor and softens nicely during a six-hour simmer on low without leaving excess grease in the broth.
With simple prep and a bright pop of citrus and greens at the finish, this slow-simmered beef soup is a straightforward, balanced meal to look forward to at the end of the day.
Sumac Lemon Lean Beef Slow Cooker Tomato Spinach Soup
Tender cubed sirloin simmers in a sumac-spiced tomato broth, finished with fresh lemon juice and delicate baby spinach in the slow cooker.
Ingredients
- 1.5 lbs (680g) lean beef sirloin, cubed
- 28 oz (800g) crushed tomatoes
- 2 cups (475ml) beef broth
- 1 tbsp (15g) ground sumac
- 2 tbsp (30ml) fresh lemon juice
- 3 cups (60g) fresh baby spinach
Instructions
- Place the lean beef cubes into the slow cooker.
- Add the crushed tomatoes, beef broth, and sumac.
- Cook on low for 6 hours until the beef is tender.
- Stir in fresh lemon juice and baby spinach just before serving, allowing the spinach to wilt in the residual heat.
Nutrition
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