Step 1

Place sliced zucchinni in colandar and sprinkle with 1 Tbs of salt

Step 2

Let sit and drain for 30 minutes or overnight if you planned ahead

Step 3

Heat oven to 400 degrees

Step 4

Lightly spray gratin or baking dish with olive oil spray (I used a 9x13" gratin dish)

Step 5

Remove zucchinni from colandar and brush off excess salt with paper or kitchen towel

Step 6

Place zucchini in overlapping formationin baking dish until full

Step 7

Scatter leeks over zucchini

Step 8

Sprinkle with parmesan cheese, garlic and thyme

Step 9

Add salt and pepper

Step 10

Lay pats of butter on top

Step 11

Bake in the middle of a 400 degree oven for 20-30 minutes, or until crispy at edges and golden brown on top