Wheat Ale Grilled Summer Veggie Chowder

Name: Wheat Ale Grilled Summer Veggie Chowder
Ingredients: 1 ear of corn, shucked; 1 large potato, sliced in half lengthwise; 1 carrot, peeled; 1 zucchini/courgette, sliced lengthwise in ¼” wide strips; Olive oil or cooking spray; 1tb butter + 1tb olive oil; 1 yellow onion, diced; Pinch of salt; 1 celery stalk, peeled and diced; ½tsp ground cumin; 2tb plain all-purpose flour; Salt and pepper; 2 sprigs fresh thyme; 1 cup (250ml) low-fat milk; 1 cup (250ml) beer; 2oz (60g) shredded sharp cheddar cheese