Clean and trim the mushrooms and cut them in half or quarters depending on size. Peel onions and cut into cubes. Wash the meat, dab dry and cut into 8-12 medallions of the same size.
Heat 2 tablespoons of oil, fry the meat for about 4 minutes, turning it well and season with salt. Take out meat, braise mushrooms and onions in the frying fat for about 4 minutes. Add cream cheese, aiwar and 4 tablespoons of water, bring to the boil and simmer briefly.
Season to taste with salt. Put the meat and mushroom pan in a greased casserole dish. Sprinkle with cheese. Bake in a preheated oven (electric cooker: 200 °C/ convection oven: 175 °C/ gas: level 3) for 10-15 minutes.
In the meantime, whisk vinegar, salt, pepper and honey for the vinaigrette. Add 2 tablespoons of oil drop by drop. Peel the shallot, cut into fine cubes and stir into the vinaigrette.
Wash lettuce, spin dry and pluck from the leaf panicles. Wash and halve the tomatoes. Clean the peppers and cut them into strips. Mix salad ingredients, arrange in a bowl and drizzle with dressing.
It goes well with baguette bread.