Miscellaneous with spinach

2 lbs tiny new potatoes , sliced 1/4-inch thick 1 cup chopped onion 3 garlic cloves , minced 3 tablespoons olive oil , divided 3 tablespoons all-purpose flour[...]

1 (10 ounce) package frozen chopped spinach 1 1/2 lbs fresh large mushrooms (about 20) 1/4 cup chopped onion 2 garlic cloves , minced 1 tablespoon margarine[...]

675 gm Floury potatoes, such as King Edwards     Few sprigs of mint 1 x 300 gram pie haddock fillet, skinned and boned 225 ml Lowfat milk     Extra virgin[...]