Arroz meloso con lomito de res y shiitake salteados
medium-grain rice (about 400 grams) • small onion, finely chopped • –3 cloves garlic, minced • ripe tomato, grated • chicken or beef broth (about 1.2 liters) • white wine (about 120 ml) • olive oil • butter • Salt, paprika, and black pepper to taste • beef tenderloin (about 400 grams) • Salt and black pepper to taste • olive oil •