Potato Vindaloo Curry

Name: Potato Vindaloo Curry
Ingredients: 1 Tbsp . cumin seeds; 1 Tbsp . coriander seeds; 4 black peppercorns; 1 tsp . tumeric; 2 tsp . paprika; 1 tsp . cinnamon; 1 tsp . mustard seeds; 3 Tbsp . vegetable oil; 2 shallots thinly sliced; 1 serrano pepper sliced in half; 1 Tbsp . tomato paste; 8 cloves garlic minced; 2 inch knob ginger peeled and minced; 3 large Russet potatoes about 2 ½ pounds cut into 1” cubes; 2 cups water; 1/3 cup apple cider vinegar; 2 tsp . brown sugar; Salt and pepper to taste; Greek yogurt for serving; Cilantro and mint for serving