Baked Portobello Mushroom Alfredo

INGREDIENTS

8 oz

fettuccine (cooked al dente)

3 cups

sliced portobello mushroom caps

1/2 cup

diced onion

1/4 cup

Horizon Organic butter

1 cup

Horizon Organic sour cream

1/2 cup

Horizon Organic shredded mozzarella cheese

1/2 cup

shredded Parmesan cheese

1/2 cup

Horizon Organic half & half

1/4 cup

panko bread crumbs

1/2 tsp

kosher salt

1/4 tsp

pepper