Meat lovers! If using protein, cook in a large non-stick pan before starting sauce. Transfer to a plate and reserve pan for sauce; no need to wipe clean. Stir protein into pasta in Step 4. If using diced chicken breasts, pat dry. Season all over with ¼ tsp. salt and a pinch of pepper. Stir occasionally with 2 tsp. olive oil over medium-high heat until chicken reaches minimum internal temperature, 5-7 minutes. If using shrimp, pat dry. Cook with 2 tsp. olive oil over medium-high heat until shrimp reaches minimum internal temperature, 2-3 minutes per side. If using ground turkey, combine with 1/4 tsp. salt and a pinch of pepper. Cook over medium-high heat with 1 tsp. olive oil. Break into small pieces with a spoon until no pink remains, 7-9 minutes.