This is super easy to make, and although you can make an entire crockpot full, you can also scale the measurements down to make a smaller batch if you need to. It is gluten-free, and you can substitute olive oil for the butter if you prefer to avoid dairy.
- Sautee the onion, garlic and shallots in the butter over low heat. Cook them until they begin to caramelize and then remove from heat.
- Pour the tomatoes into a 5-quart crock pot. Add vegetable broth and orange juice. Stir until well mixed, then fold in the onions, garlic and shallots.
- Season with salt and pepper to taste, then allow to simmer on low for about 8 hours.
- Add the rosemary about 1–2 hours before you want to eat for best flavor–if you put the rosemary in too early, it tends to lose some its earthiness while cooking.