Split Pea Curry

Split Pea Curry - 2 tablespoons coconut, olive, or vegetable oil, 1 medium red onion, chopped, 4 large carrots, scrubbed, chopped, kosher salt, 1 teaspoon fennel seeds, 2 teaspoons madras curry powder, 1 teaspoon mustard seeds, 12 ounces yellow split peas, 6 cups chicken stock.