Braised Smoked Ham Shank with Beans and Rice

Ingredients

• 1 - 1 3/4 to 2 pound smoked ham shank (whole or cracked)
• 2 Tbsp butter
• 2 Tbsp olive oil
• 32 ounces chicken stock
• 2 onions, peeled and cut in quarters
• 2 carrots, cut in chunks
• 2 celery stalks, cut in chunks
• 4 cloves garlic, peeled and smashed
• 1 - 15 ounces can dark red kidney beans, drained
• 1 - 15 ounces can pinto beans, drained
• 4 cups cooked white rice
• Salt and pepper to taste