Set up grill for direct and indirect cooking and heat to medium. Once hot, clean and lightly oil grates with canola oil.
In bowl, combine cream cheese, sour cream, lemon zest and juice, garlic, ¼cup Parmesan and ½ tap each salt and pepper. Fold in artichokes and spinach. Transfer to 20 cm cast-iron skillet. Top with remaining ¼ cup Parmesan and cover with aluminium foil.
Place skillet over indirect heat and cook, covered, 10 mins. Remove foil and rotate skillet, keeping over indirect heat; cook uncovered, until bubbling and golden brown, 18 to 20 mins. Remove from grill.
Drizzle bread with olive oil and grill on direct heat, turning occasionally, until crisp, about 1 min. Serve with dip.
Notes
Photographed By MIKE GARTEN Prop Styling By ALEX MATA Food Styling By SIMON ANDREWS