Ingredients Meat & Poultry Beef Recipes Ground Beef Recipes Lighter Beef Tacos 3.6 (62) 17 Reviews By Martha Stewart Editors Martha Stewart Editors Facebook Instagram Twitter Website An article attributed to "Martha Stewart Editors" indicates when several writers and editors have contributed to an article over the years. These collaborations allow us to provide you with the most accurate, up-to-date, and comprehensive information available.The Martha Stewart team aims to teach and inspire readers daily with tested-until-perfected recipes, creative DIY projects, and elevated home and entertaining ideas. They are experts in their fields who research, create, and test the best ways to help readers design the life they want. The joy is in the doing. Editorial Guidelines Updated on May 16, 2017 Print Share Share Tweet Pin Email Prep Time: 20 mins Total Time: 20 mins Servings: 4 These soft tacos use lean ground sirloin and low-fat corn tortillas as sensible substitutions. Skip the sour cream and guacamole -- opt for a fiery salsa instead. Ingredients 1 teaspoon vegetable oil, such as safflower 1 large onion, chopped 2 bell peppers (ribs and seeds removed), chopped 3 garlic cloves, minced 2 tablespoons tomato paste 2 teaspoons chili powder 1 ½ teaspoons ground cumin Coarse salt and ground pepper ¾ pound ground beef sirloin 12 soft corn tortillas (6-inch) Store-bought salsa and shredded iceberg lettuce, for serving Directions In a large nonstick skillet, heat oil over medium. Add onion and bell peppers; cook until crisp-tender, 3 to 5 minutes. Add 1 cup water; cook until water has evaporated and vegetables are softened, 3 to 5 minutes. Add garlic, tomato paste, chili powder, and cumin; season with salt and pepper. Cook, stirring, 1 minute. Add beef. Cook, breaking up meat with a wooden spoon, until no longer pink, about 5 minutes. Season taco filling with salt and pepper. To serve, spoon filling onto tortillas, top with salsa and lettuce, and fold to enclose. Cook's Notes For the best flavor, warm the tortillas briefly in the microwave before serving. Print