Remove the stem of the cabbage to create a flat surface. Place the cabbage (stem side down) onto a cutting board. Slice the cabbage into 4-6 equal sized rounds. They should be about 1 inch in thickness.
Brush each side of the cabbage rounds with olive oil and sprinkle each side with salt and garlic powder.
Add the mini potatoes, cut red onion, olive oil, garlic powder, thyme, and salt to a large mixing bowl. Toss together until potatoes are coated with spices. Spread on a baking tray.
Bake the cabbage and potatoes for 30-40 minutes.
Add the remaining olive oil, lemon juice, dijon mustard, garlic and dill to a small mixing bowl or jar. Mix together until the oil has incorporated.
To serve: drizzle the lemon dill dressing over a cabbage steak and plate with roasted potatoes and onions. Enjoy!
Notes
Aim to for the cabbage rounds to be the same thickness - about 1 inch or less. If the cabbage rounds are thicker they will need to roast longer (40-50 minutes).
Cut the onions in larger chunks or wedges so they don't burn.
The core of the cabbage will remain firm, so when checking for doneness, check just outside the center of the cabbage steaks.
Store leftovers in an airtight container in the fridge for up to 3 days for the best flavor.