1: Make lime crème pâtissière (confectioner's custard) as for 300 g confectioner's custard (crème pâtissière, or french pastry cream), but with these special proportions: 30 g caster sugar and 30 g cornflour, and infuse milk with finely chopped zest of 1 lime before boiling. Then, when cream is cooked, beat into it juice of 1 lime, and if desired 3 drops food colouring (green). Leave to cool covered to prevent skin forming, or whip during cooling from time to time. Set aside your lime crème pâtissière.
3: Peel 5 Pears, cut in four, discard core and sprinkle with juice of 1 lemon .
4: Melt 30 g clarified butter in a frying pan, then tip in pear quarters (and lemon juice).
5: On high heat, cook until they begin to brown. Note: Clarified butter is preferable, to avoid the little black bits visible in this photograph, due to overheating ordinary butter. Set pears aside.
7: Lighten the cream by folding 2 large spoonfuls of meringue into cold lime crème pâtissière,.
8: Continue gently, by tilting the pan, until you have a light cream.
9: Put a layer of this cream in the cooked pastry case.
10: Arrange pears quarters on cream.
11: Spread the rest of Italian meringue on top of the tart. You can use a forcing bag as in the photograph, or a spatula and then draw patterns with a fork on the surface.
12: For best results, meringue should cover the whole surface of the tart.
13: To finish, brown the meringue gently with a blow lamp, or by putting under the grill for just a few seconds.
14: It's ready, refrigerate until serving.
Remarks
If you want to simplify the recipe, use French meringue (with caster sugar, not cooked) instead of Italian.