Cook the couscous according to the instructions on the packet.
Peel the red onions and cut into wedges. Dice the Hokkaido. Place both on a baking sheet, drizzle with 1 tablespoon of olive oil and season with salt, pepper, rosemary and thyme.
Bake in the oven preheated to 180 ° C for about 15-20 minutes.
In the meantime, stir the marinade. Mix in the remaining olive oil, lemon juice, parsley, finely chopped clove of garlic, salt and pepper.
Take the vegetables out of the oven and let them cool down a little. Then mix with the cooked couscous and the leafy apple and pour the marinade over them. Stir it and let it steep for a short time if necessary.