1. Peel and chop the 4 shallots.
2. Peel and crush the garlic clove.
3. Peel the dozen pearl onions.
4. Open the can of tomatoes and cut them.
5. Dissolve the tomato paste in the 20 cl of white wine.
6. In a cast iron casserole dish, heat the butter and oil and brown the monkfish slices over high heat.
7. Flambé them with Cognac, then remove and place on a plate.
8. In their place, add the shallots, garlic, onions, tomatoes, and the wine in which the tomato paste was dissolved. Season with salt, pepper, and add the chili pepper. Let simmer uncovered for about 20 minutes.
9. Return the monkfish to the sauce, cover, and let cook for another 20 minutes.
10. Serve with steamed vegetables, potatoes, and carrots.