Heat the olive oil in a large skillet over medium heat. When the oil shimmers, add the cremini mushrooms, onions, salt, and pepper. Cook for 5 minutes, until the mushrooms begin crisping on the edges. Add the button mushrooms and continue to cook another 5 minutes. Reduce the heat to low, stir in about 1/2 of pineapple sauce and the remaining pineapple chunks. Simmer for 5-8 minutes or until the sauce has reduced and coats the mushrooms, there will still be sauce left in the pan. Remove from the heat and stir in the cilantro.