Cauliflower with Olives and Cherry Tomatoes

0 Preheat oven to 400F.
4 Wash the cauliflower well by dipping it in abundant salted water and wash. Rinse well and proceed with the recipe.
1 Place the cauliflower on a sheet pan and toss with olive oil.  Roast for 20 to 30 minutes, until it starts to brown and becomes soft. Turn it occasionally to brown evenly.
2 When the cauliflower is almost done add the whole cherry tomatoes and olives to the sheet pan and continue roasting until the tomatoes are just starting to burst about 5 more minutes.
3 Season with salt and lemon dressing.  Finish by adding the arugula and stirring just to wilt.
Lemon Dressing
6 Place the grated garlic clove, lemon juice, oregano leaves, and salt in a jar with a twist seal top. Add the olive oil and shake well until all the flavors have been incorporated.