Slow Cooker Vegan Lentil Stew

I saw this on a Facebook page for boat cooking and I'm so glad I decided to try it!  Very easy to toss together and the depth of flavor is amazing!!!

Slow Cooker Vegan Lentil Stew

1/2 yellow onion, chopped

2 cloves garlic, minced

2 carrots, chopped

2 stalks celery, chopped

1 lb. potatoes (red or yellow are great but really any potato works), diced into 1/2" dice

1/2 cup brown lentils

1/2 tsp. rosemary

1/2 tsp. thyme

1 tsp. oregano

1/2 Tbsp. Dijon mustard

1 Tbsp. soy sauce

1/2 Tbsp. brown sugar

3 cups vegetable broth

1/2 cup frozen peas

Combine all ingredients except peas in slow cooker.  Cook on low for 7-8 hours or on high for 3-4.  Just before serving, add peas and cook for an additional 15 minutes.