Traditional Vegetable Curry

Name: Traditional Vegetable Curry
Ingredients: 2 tablespoons coriander seeds; 1 tablespoon cumin seeds; 1 teaspoon fenugreek seeds; 1 teaspoon black mustard seeds; 3 tablespoons grapeseed oil; 2 tablespoons minced ginger; 1 tablespoons minced garlic; 1 large onion, thinly sliced; 1/4 cup dried curry leaves; 1 tablespoon garam masala; 1 teaspoon turmeric; 1/4 cup tomato paste; 2 cups cherry tomatoes; A pinch of salt; A pinch of pepper; 5 cups buttermilk; 2 cups baby red potatoes, washed and cut in half; Minced green chilies