Cook the beef: Heat olive oil in a large skillet over medium heat. Add the onion and cook until translucent. Add garlic and cook for 1 minute. Add ground beef, breaking it up with a spatula, and cook until browned. Drain excess fat.

Add sauce and vegetables: Add red bell pepper, soy sauce, sriracha, cumin, paprika, salt, and pepper to the beef. Simmer for 5 minutes.

Assemble lettuce wraps: Spoon the beef mixture onto fresh lettuce leaves. Garnish with diced green onions or sesame seeds, if desired.

Nutritional Information (per serving):

Calories: Approximately 300-350

Protein: Approximately 30 grams

Carbohydrates: Approximately 10-15 grams

Fat: Approximately 20-25 grams

Note: These are approximate values and may vary depending on the specific ingredients and portion sizes used.