Budget-Friendly Shepherd's Pie

Ingredients (for 4 servings)

• 2 lb — Yukon gold potatoes
• 2 cup — plant-based milk
• 0 whole — Sea salt
• 0 whole — black pepper
• 1 cup — onion
• 1 cup — carrots
• 1 cup — celery
• 1 cup — corn
• 3 clove — garlic
• 1.5 tsp — Italian seasoning
• 0.25 cup — oats
• 1 tbsp — white wine vinegar