How to Make It
Preheat grill to high (450°F to 500°F). Toss together strawberries and oil in a bowl.
Skewer strawberries, and place on grates; grill until slightly charred, about 1 minute. Flip skewers, and grill other side until just beginning to soften, about 1 minute more.
When cool enough to handle, remove from skewers. Slice strawberries; discard stems. Toss together sliced berries and sugar in a medium bowl; let stand 10 minutes, stirring occasionally.
Brush tops of cake cups with melted butter. Grill until lightly toasted, about 1 minute per side. Fill cake cups evenly with sweetened grilled berries; top with a dollop of whipped cream.