Put broth or water into pot and cut potatoes, salt and rice.
Bring to a boil and then reduce to simmer until potatoes are tender. About 20 minutes.
While potatoes are cooking, use a separate skillet and put diced onions with 2 Tbps butter and fry (without browning) until soft.
Next, add tomatoes and peppers to onions and fry for 10 min.
When potatoes are tender, remove potatoes (leaving the rice in the pot) to a bowl, mash add remaining butter (3 Tbsp) to the tomato-pepper combo. Mix well within your skillet. Keeping the rice in the pot with the broth or water.
Lastly, add the potato, tomato, and pepper mixture into the pot with the rice and broth. Stir and serve with your favorite protein. Best combinations are previously cooked chicken, turkey or pork sausages.