Heat the oil in a pan. Add the garlic and leek and fry for 2-3 minutes.
Add the mushrooms and continue to fry for a further 2-3 minutes until the mushrooms are soft, season to taste.
In a separate pan, melt the butter over low heat, add the Loprofin Baking Mix. Stir over low heat for a few minutes.
Using a whisk, stir the Milupa-lp-Drink or Sno-Pro gradually into the flour mixture.
Bring to the boil while stirring, until sauce has thickened. Season with salt and pepper and set aside.
Layer the bottom of an oven-proof dish with ¼ of the mushroom mixture, and layer over some spinach leaves.
Cover with Loprofin Lasagne sheets and ¼ of the white sauce. Repeat the process 4 times, ending with white sauce and layering a few mushrooms over the top.
Bake for 35-40 minutes until golden and the lasagne is cooked.