Slow cooker full chicken dinner

You’ll need

4 bone-in chicken thighs cooking oil
1.5 lbs Yukon gold potatoes, diced
1 pound green beans, ends snipped
2 garlic cloves, minced
1 (8-oz) can tomato sauce (not paste)
1½ tsp. salt
¼ tsp. pepper
½ tsp. dried thyme
½ tsp. dried rosemary