Jalapeno Corn Chowder with Leftover Ham

Name: Jalapeno Corn Chowder with Leftover Ham
Ingredients: 2 Tbsp oil; 1 medium onion (chopped); 2 large jalapenos (chopped fine (about ⅓ cup)); 1 Tbsp garlic (minced (2-3 large cloves)); 3 cups potatoes (peeled and chopped (about 3 large)); 4 cups corn (frozen or fresh (if using canned, be sure to drain)); 2 cups ham (cooked and chopped); 4 cups chicken broth; 1 cup cream (or whole milk); 1 cup cheddar cheese (shredded (more to top)); ½ tsp salt (more to taste); ½ tsp black pepper; 2 Tbsp flour