Homemade Gluten Free Clam Chowder in Potato Bowls

Name: Homemade Gluten Free Clam Chowder in Potato Bowls
Ingredients: 12 slices uncooked bacon; 4 wide russet potatoes; 2 cups chopped potatoes; 1/2 cup chopped cooked bacon (* see note); 1/2 cup chopped onion; 1/4 cup sliced celery; 1 tablespoon olive oil; 1 minced garlic clove; 3 cups whole milk (* see note); 20 ounces canned clams (1 can drained, one can with liquid); 2 cups water; 1/2 cup heavy cream; 1 tablespoon dried sage; 1 teaspoon paprika; 1 1/2 teaspoons salt; 1/2 teaspoon ground black pepper; 2 tablespoons cornstarch (* see note)