Calories per Ingredient. Here are the foods from our food nutrition database that were used for the nutrition calculations of this recipe. Calories per serving of Spaghetti Meat Sauce. 102 calories of Ground Beef 93% Lean, (2.40 oz) 48 calories of Prego 100% Natural Traditional Sauce (1/2 cup), (0.60 serving) 37 calories of Canola Oil, (0.30 tbsp) 4 calories of Onions, raw, (0.10 medium (2-1/2 dia))