Vegan Cabbage and Chickpea Pie

Ingredients:
For the filling:

• 500 g of cabbage
• 100 g of onions
• 100 g of carrots
• 60 ml of vegetable oil
• 1 teaspoon of salt
• Pepper
• 400 g of cooked chickpeas

For the batter:

• 240 ml of plant-based milk (such as almond, soy, or oat)
• 3 tablespoons of ground flaxseed
• Half a teaspoon of salt
• 100 g of vegan sour cream
• 100 g of flour
• 4 g of baking powder