To the pan, add in the garlic, red onion, bell pepper, and tomato. Sauté for 5 minutes, or until the garlic is aromatic, the onions are softening and the tomatoes are beginning to break down. Add the bone broth, and simmer for 2-3 minutes, or until slightly reduced. Turn off the heat, add in the heavy cream and stir gently to combine. Taste for seasoning. Add the Salmon back into the pan, and serve!