Ingredients for 4 servings 1 tablespoon olive oil1 lb ground beef(455 g)½ cup yellow onion(75 g), diced4 ½ tablespoons taco seasoning, or 1 package1 tablespoon tomato paste10 oz tomato(285 g), diced, 1 can8 oz spaghetti(225 g)3 cups water(710 mL)½ cup cheddar cheese(50 g), shredded½ cup mozzarella cheese(50 g), shredded1 roma...