Skillet Sauerkraut Kielbasa and Pierogi Bake | Heinen's Grocery Store

Ingredients

• 1 Ib. Heinen's antibiotic-free Polish style kielbasa
• 1 tsp. Heinen's olive oil
• 1 container (15 oz.) Wake Robin Sauerkraut
• 1/2 large yellow onion, sliced
• 1 tsp. Heinen's fennel seeds
• 1/2 tsp. fresh thyme
• 1 cup Heinen's chicken stock
• 1 1/2 Tbsp. Heinen's stone ground mustard
• 1 package Heinen's frozen pierogis
• 3/4 cup Heinen's white cheddar cheese
• 3/4 cup Heinen's Swiss cheese
• 1 tsp. salt
• 1 tsp. fresh ground pepper
• Scallions or chives, for topping