Heat olive oil in large skillet. Sauté onion, garlic, green onion, leek, green pepper, red pepper, and jalapeño until softened. Add ground beef and cook until browned. Add spices: red pepper flakes, dry mustard, cumin, chili powder, and brown sugar. Add green chiles, tomatoes, parsley and cilantro, stirring to combine. Add Worcestershire sauce and ketchup. Cook for about 15 minutes. Add salt and pepper to taste. Heat tortillas in a hot dry skillet, grill, grill pan or griddle just to char (about 10-15 seconds on both sides). Spoon Southwestern Sloppy Joe mixture in the middle of the tortilla. Sprinkle lettuce and cheese over top. Roll up burrito-style.