To prepare shallots, cut one from root to top, set one half aside, and slice lengthwise from side and top, then mince. This is the simplest technique for cutting any onion.
For garlic, crush them with your palms to peel off the skins and cut off the hard ends. Use the blunt end of the knife to crush the garlic into a slicing motion to break up the cloves better and make it easier to mince.
For mushrooms, unwrap the plastic around the container, take what you need, and re-wrap it to avoid a mess.
For a smoother texture without cottage cheese clumps, you can blend the cottage cheese before adding it to the eggs.
When using frozen broccoli or other vegetables, heat them in a microwave-safe dish with a little water for about 4 minutes to draw out excess moisture. If you skip this step, the quiche may become watery.