Alfredo without ricotta provolone nuts

2 large skinless chicken breasts , cut in 1/2-inch strips 4 tablespoons olive oil , total 1 leek , sliced in 1/2-inch rings, rinsed 1 small onion , diced 1/2[...]

4 cups uncooked rotini pasta or 4 cups penne (8 oz.) or 4 cups bow tie pasta (8 oz.) 1 1/2 cups frozen sweet peas 1 cup shredded carrot (2 small) 1 tablespoon[...]