Stuffed Mushrooms without vegetables tuna

1 cup chopped yellow onion 1 10-oz pkg chopped frozen spinach , thawed & squeezed 8 oz bacon slices 4 oz crumbled Feta cheese 4 oz cream cheese room[...]

280 g spinach , stalks removed, washed 500 g medium cap mushrooms 25 g butter ½ small onion , chopped 25 g bacon , chopped Salt and pepper 5 tbs double cream[...]