The discipline of yoga suggests a pure (ethical) vegetarian diet, which facilitates the development of sattva. Besides, food plays an important part in meditation. Different foods produce different effects on different compartments of the brain. For purposes of meditation, the food should be light, nutritious and Sattvic. Sattva is a quality of love, awareness, connection, and peace with all sentient beings.
“Conquer ālasya (laziness) by āsanas, prānāyāma, and light sattvic food.” Swami Sivananada (1887-1963)