Step 1

Purée chile, anchovies, tuna, mayonnaise, lime juice, capers, ¼ cup oil, and 2 Tbsp. water in a blender until smooth. Season tonnato with salt.

Step 2

Prepare a grill for medium-high heat. Toss beans in a medium bowl with remaining 2 Tbsp. oil; season with salt. Working in batches if needed, grill beans in a single layer (if you have a perforated grill pan, this is the perfect time to use it!), turning frequently, until charred on all sides, about 6 minutes.

Step 3

Pour one-quarter of tonnato on a platter. Arrange beans over, then drizzle with remaining tonnato. Top with some cilantro and pumpkin seeds and squeeze a little lime juice over.