Pasta Pesto with Asparagus and Peppers

Ingredients:

200g Dried Penne Pasta - Pasta Tubes
4 tbsp Green Pesto
1 Tin of Asparagus Spears (if you prefer fresh then you will need to cook them first)
1 Red Pepper
1Yellow Pepper
1Green Pepper
1 small Tub Natural Yogurt
Good handful of fresh Basil leaves - reserve a few for garnish.
Salt and pepper to taste
1tbsp Olive Oil
A little grated cheese to garnish. (optional)...