Vegetable Pot Pie

Ingredients

• 2 tbsp butter
• 2 stalks celery (coarsely chopped)
• 1 yellow onion (coarsely chopped)
• 1 large carrot (peeled and cut into small chunks)
• 1 small red bell pepper (seeded and coarsely chopped)
• 3/4 tsp dried thyme (crumbled)
• 3 tbsp all-purpose flour
• 1 cup vegetable broth or bouillon
• 1 cup broccoli florets
• 1 cup cauliflower florets
• 1 cup frozen pearl onions
• 2 oz cheddar cheese (cut into small cubes)
• Lattice pastry top or plain pastry circle (for one-crust 9-inch pie)