Place the oil, honey, and marshmallows in a large mixing bowl set over a pot of gently simmering water. Stir until the marshmallows are melted, 4 to 5 minutes. Once the marshmallows are melted, quickly add the toasted brown rice, almonds, and fruit, and stir to combine. Coat your hands or a spatula with oil and spread the mixture evenly into the pan. Once the mixture has cooled completely, cut into squares and store in an airtight container for up to 2 days.