Use freshly ground spices for best flavor and choose ground beef with some fat for juiciness. Don’t skip the vinegar which adds brightness. For more heat, increase crushed red pepper flakes or add cayenne pepper. You can add vegetables like bell peppers or mushrooms for extra nutrition. Variations include using ground turkey, chicken, or vegetarian substitutes like lentils or TVP. Store leftovers in the refrigerator for 3-4 days or freeze up to 3 months.