Adjust racks to top and middle positions and preheat oven to 425 degrees. Bring garlic herb butter to room temperature. Wash and dry produce.

Halve potatoes lengthwise; toss on a baking sheet with a drizzle of oil, salt, and pepper.

Roast on top rack until browned and tender, 20-25 minutes.

Meanwhile, trim and discard woody bottom ends from asparagus; halve crosswise. Toss on one side of a second baking sheet with a drizzle of oil, salt, and pepper. (For 4 servings, spread asparagus out across entire sheet.) Roast on middle rack, 5 minutes (you’ll add more to the sheet then).

Halve baguette lengthwise. Once asparagus has roasted 5 minutes, add baguette to empty side of baking sheet. (For 4, leave asparagus roasting; place baguette directly on middle rack.)

Roast until asparagus is tender and browned and baguette is golden and crispy, 6-8 minutes.

Meanwhile, dice gouda into ¼-inch pieces.

Halve, core, and thinly slice apple.

Pat beef* dry with paper towels. Season all over with salt and pepper.

Heat a drizzle of oil in a large pan over medium-high heat. Add beef and cook to desired doneness, 4-7 minutes per side.

Remove pan from heat. Add half the garlic herb butter to pan (you’ll use the rest later); let melt and spoon over beef until coated. Transfer beef to a cutting board to rest.

While beef rests, heat cream sauce base and cheese roux in a small pot over medium-high heat until steaming and slightly bubbling, 1-2 minutes.

Reduce heat to medium. Add gouda and cheddar one small handful at a time, alternating and whisking constantly between additions until melted. Remove from heat.

Transfer potatoes to a large bowl and toss with remaining garlic herb butter; season with salt and pepper.

Thinly slice beef against the grain; place on a plate. Pour any resting juices over top. Slice baguette into 1-inch strips; halve strips to create short spears.

Place potatoes, beef, asparagus, apple, and baguette spears on a large board or platter. Serve with fondue for dipping. TIP: Place a trivet or kitchen towel underneath the fondue pot to protect your surface.