In a medium saucepan, heat oil over medium heat. Add onion, jalapeno, garlic, oregano, and cumin; season with salt and pepper. Cook, stirring occasionally, until vegetables begin to soften, 3 to 4 minutes.
Add turkey and cook, breaking up with a spoon, until no longer pink, 2 to 3 minutes. Add beans and 3/4 cup water. Bring to a boil, while mashing some of the beans against side of pan to release starch. Reduce heat to medium and simmer until thickened, 5 to 10 minutes.
Season with salt and pepper; garnish as desired.
Mashing some of the beans during cooking gives you the texture of a slow-cooked sauce without adding to your kitchen time. The ground turkey we've used for this recipe (7 percent) is made from dark meat and is moist and tender.