Heat the olive oil in a large non-stick pan over medium-high heat. Start with the larger varieties of mushroom. Spread them in a single layer in the pan and fry, without stirring, until golden brown – about 2 minutes. Stir and continue frying until golden on the other side. Remove to a plate and continue with the smaller varieties of mushroom. Remove to the plate with the other mushrooms then quickly fry the shallots, 2 minced cloves of garlic and thyme until soft and transparent. Combine with the fried mushrooms and sprinkle over some salt and pepper.