Welcome back to Ask Eat.Drink.Lagos, our Lagos dining (and sometimes, life) advice column. As usual, for the simpler questions, ask the bot. But, for life's tougher questions, you're more than welcome to email us.
Monday is tough restaurant-wise in Lagos. But your best bet is one of the hotels. Hotels have to be open on Monday and therefore, their restaurants have to be as well. Of the lot, 1415 (Eko Hotel) is the best one.
Sao Cafe in Lekki should work for what you describe.