To test the beet for done-ness, prick the beet with a fork. The fork should pierce and sink into the beet easily with no resistance.
To test the chickpeas for done-ness, take one chickpea in between your thumb and index finger. Press gently. When done, the chickpea should give easily under the light pressure from your fingers.
To roast the garlic, start with a bulb of garlic which has been cut at the top to expose the garlic inside. drizzle one teaspoon of olive oil over the bulb. Wrap in foil and bake at 200 degrees centigrade for 20 - 30 minutes until the garlic is soft, and comes out of its shell with a gentle press.