Japanese Pork Curry Bowl

Name: Japanese Pork Curry Bowl
Ingredients: 1 1/3 Pound pork loin, small diced; 1 Tablespoon olive oil; 1 Tablespoon cumin seed; 1 Tablespoon unsalted butter; 2 Medium carrots, peeled and diced; 1 Yellow onion, minced; 1 Stalk celery, finely grated; 1 Clove garlic, finely grated; 1/2 - inch Fresh ginger, finely grated; 2 Yukon gold potatoes, peeled and diced; 1 Tablespoon ketchup; 1 Tablespoon hot paprika; 1 1/2 Teaspoon red miso; 1 Cup pork stock; 1 Bay leaf; 1/2 x 1/2 - Inch Piece Japanese brick curry *; 2 Teaspoons rice vinegar; Salt and pepper, to taste; 4 Cups steamed white rice