Hoisin (but not really) Country Ribs

1 tablespoon peanut oil

3 pounds country-style pork ribs

1 (15 ounce) can tomato sauce

1 tablespoon dried minced onion, or more to taste

⅓ cup hoisin sauce

3 shiitake mushrooms, sliced

Heat the peanut oil in a large skillet over high heat. Brown the ribs evenly in the hot oil, about 5 minutes; remove from heat.

Stir the tomato sauce, dried onion, hoisin sauce, and shiitake mushrooms together in a slow cooker. Add the ribs to the sauce mixture, turning to coat in the sauce.

Cook on Low until the ribs are falling-apart tender, 8 to 10 hours.