Heat olive oil in a large, deep skillet or paella pan over medium heat.
Sauté the onion, garlic, red bell pepper, and cherry tomatoes until softened and fragrant, about 3–4 minutes.
Add the chorizo or sausage and cook thoroughly, about 5 minutes.
Stir in the saffron and white wine, allowing it to combine with the aromatics and chorizo. Cook for 1–2 minutes.