Farro with Cherry Tomatoes, Basil and Parmesan {Slow Cooker}

INGREDIENTS

1 cup

finely chopped onion

2 cups

cherry or grape tomatoes (halved or quartered if large)

4 cups

water

2 cups

whole-grain or pearled faro (rinsed and picked over)

1 1/2 tsp

salt

2 tbsp

olive oil

1/2 cup

freshly grated Parmesan cheese

1/2 cup

chopped fresh basil

Salt and freshly ground black pepper