slow cooker lentil shepherd's pie

INGREDIENTS

large yellow onion (diced)

1 tbsp

extra virgin olive oil

stalks celery (diced)

large carrots (peeled and diced)

2 cloves

garlic (crushed)

1 tsp

salt

1/2 tsp

dried thyme

1/2 tsp

freshly cracked black pepper

1 1/2 cups

puy lentils (picked over and rinsed well)

1 can

diced tomatoes)

2 cups

vegetable broth

1 cup

frozen peas

4 cups

mashed potatoes (or baked sweet potatoes)