Food in Genting is generally overpriced and mediocre. Local, Western and fast food are available, but prices are often twice or more what the same meal would cost in Kuala Lumpur. Most restaurants are halal to cater for the large number of Muslim visitors.
Budget
There are a number of fast food chains like McDonald, Burger King, KFC, and Marrybrown. All these restaurants charge about 50% higher than what they charge elsewhere in Malaysia. Try Marybrown's Nasi Lemak meal as breakfast: one piece of chicken, a hot tea/coffee, and other Nasi Lemak condiments for RM ~1