Chard and courgette tart

Ingredients

• 2 teaspoons dry yeast
• 1/2 cup warm water
• 1/4 teaspoon sugar
• 1 egg
• 1/4 cup olive oil
• 1 cup wholewheat flour
• sift
• stir yeast into flour
• 1 cup plain flour
• 3/4 teaspoon salt
• 450g chard
• wash chard leaves
• blanche leaves in boiling salted water 1 minute, then immediately chill to prevent further cooking
• toss
• chards stems
• slice thinly
• cook 5 minutes
• 2 tablespoons olive oil
• 1 medium onion
• chop finely
• 1kg courgette
• cut into small dice
• cook 10 minutes
• 3 cloves garlic
• mince
• cook 1–2 minutes
• 1 teaspoon fresh thyme
• chop
• 1 teaspoon fresh rosemary
• 50g gruyere cheese
• grate
• mix in
• 3 eggs
• beat