Core and slice the fennel
Clean the mushrooms carefully, trim and slice
Peel and slice the banana shallots
Slice the pork into pieces around the size of your little finger
Put the mushrooms in a heavy-based frying pan and heat gently. They will sweat a little and then gradually caramelize and soften. Once they look as if they are nearly cooked, dress with a little of the oil and put in the oven to keep warm
Put the remainder of the olive oil in the frying pan, then add the shallots and cook gently over medium heat until they soften and start to brown at the edges. Then, put in the oven to keep warm
Cook the fennel in the same pan until soft. If necessary, add a little water to the pan. Once the fennel starts to soften, put it in the oven to keep warm
Raise the heat and pan-fry the pork for about 4 minutes, turning frequently till all sides are sealed.
Return all the other cooked ingredients to the pan, season with salt and pepper and stir through the creme fraiche. Heat very gently till warmed through
Serve with puy lentils and a salad garnish.