Krishna Wants Vegetarian Food Offered to Him

If one offers Me with love and devotion a leaf, a flower, fruit or water, I will accept it. Bhagavad-gita 9.26
 

PURPORT
One who loves Krishna will give Him whatever He wants, and he avoids offering anything which is undesirable or unasked. Thus meat, fish and eggs should not be offered to Krishna. If He desired such things as offerings, He would have said so. Instead He clearly requests that a leaf, fruit, flowers and water be given to Him, and He says of this offering, "I will accept it." Therefore, we should understand that He will not accept meat, fish and eggs.

Vegetables, grains, fruits, milk and water are the proper foods for human beings and are prescribed by Lord Krishna Himself. Whatever else we eat cannot be offered to Him, since He will not accept it. Thus we cannot be acting on the level of loving devotion if we offer such foods.

In the Third Chapter, verse thirteen, Sri Krishna explains that only the remains of sacrifice are purified and fit for consumption by those who are seeking advancement in life and release from the clutches of the material entanglement. Those who do not make an offering of their food, He says in the same verse, are eating only sin. In other words, their every mouthful is simply deepening their involvement in the complexities of material nature. But preparing nice, simple vegetable dishes, offering them before the picture or Deity of Lord Krishna and bowing down and praying for Him to accept such a humble offering enables one to advance steadily in life, to purify the body, and to create fine brain tissues which will lead to clear thinking. Above all, the offering should be made with an attitude of love. Krishna has no need of food, since He already possesses everything that be, yet He will accept the offering of one who desires to please Him in that way. The important element, in preparation, in serving and in offering, is to act with love for Krishna.