INGREDIENTS
1 tbsp
olive oil
1/2
small onion (chopped)
14 oz
/390 gram can crushed tomatoes
1
garlic clove (crushed)
1/2 tsp
dried oregano
1
bay leaf
1 tsp
balsamic vinegar
1
salt & pepper to taste
1 pinch
red pepper flakes
30 oz
ricotta
2 cups
finely chopped spinach (measure the spinach before chopping, firmly packed)
2 tbsp
basil (chopped)
1
large egg
1/4 cup
freshly grated Parmesan cheese
10 oz
mozzarella cheese (shredded | 2 1/2 cups)
4
medium zucchini (thinly sliced lengthwise + salt for drawing out water)