Sweet Potatoes and Spicy Chorizo Stew

large sweet potatoes, peeled and cubed

large yellow onion, peeled and cut into 8 pieces

large red bell pepper, chopped

to 2 1/2 pounds bulk pork chorizo sausage (without casing)

garlic, chopped

or 200 grams) can or bottle tomato paste

salt

dried basil

dried rosemary

olive oil

Pepper