Pinched from the link above. It is very basic but gives you the idea of mixing protein sources.
Pulses (beans, peas, lentils) with dairy products (e.g. milk, cheese) = Baked beans with grated cheese, lentil dhal with natural yoghurt
Whole grains (brown rice, noodles, couscous, whole-wheat bread) with pulses (beans, peas, lentils) = baked beans on toast, risotto with peas, mexican tortilla with refried beans
Pulses (beans, peas, lentils) with seeds and nuts = hummus (chick peas with sesame seed oil), mixed bean salad with flax seed oil dressing.
Dairy (e.g. milk, cheese) with whole grains (brown rice, noodles, couscous, whole-wheat bread) = Cheese sandwich with wholemeal bread, porridge with milk.
Do add veg, especially dark green ones.