Rissoles: ½ large onion (grated), ½ cup panko breadcrumbs, 500 g ground beef, 1 small zucchini (grated), 1 small carrot (grated), 1 large egg, 1 garlic clove (crushed), ½ tsp dried thyme (optional), ½ tsp dried oregano (optional), ¼ tsp black pepper, ¾ tsp kosher or cooking salt, 2 tsp Worcestershire sauce

Cooking: 2 Tbsp olive oil (divided)

Mushroom Gravy: 2 Tbsp unsalted butter, ½ onion (sliced), 2 garlic cloves (chopped), 200 g mushrooms (sliced), 3½ Tbsp all-purpose flour, 2 cups beef stock, ¼ tsp salt, ¼ tsp black pepper, 1 tsp Worcestershire sauce

To serve: Mashed potato or preferred base, chopped parsley (optional garnish)