Slow Cooker Oxtail Stew Recipe

1 tablespoon vegetable oil

3 pounds beef oxtail

cut into pieces

1 ½ pounds russet potatoes

peeled and cut into chunks

4 carrots

peeled and cut into large chunks

3 stalks celery

cut into large chunks

1 onion

chopped

1 (15 ounce) can tomato sauce

1 cup beef broth

½ cup dry red wine

2 tablespoons chopped fresh parsley

1 tablespoon Worcestershire sauce

1 teaspoon dried thyme

½ teaspoon smoked paprika

1 (8 ounce) package sliced mushrooms

1 cup frozen peas

1 pinch salt and freshly ground black pepper to taste