Cook fettuccine following packet directions. Drain and keep warm.
Meanwhile, heat oil in a frypan and cook chicken for 2-3 minutes or changed in colour.
Add mushrooms to pan and cook for a further 1-2 minutes. Pour in Leggo's Pasta Sauce and stir in Birds Eye Garden Peas. Cover and simmer for 5 minutes, stirring occasionally.
Toss pasta in sauce and serve immediately.