Slow Cooker Spinach Marinara Sauce Recipe

¼ cup olive oil

1 onion

chopped

5 cloves garlic

minced

⅓ cup grated carrot

1 (10 ounce) package frozen chopped spinach

thawed and drained

2 ⅔ (6 ounce) cans tomato paste

1 (4.5 ounce) can sliced mushrooms

drained

2 tablespoons salt

2 tablespoons dried oregano

2 tablespoons dried basil

2 ½ tablespoons crushed red pepper

2 bay leaves

1 (28 ounce) can peeled and crushed tomatoes

with liquid