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Trace of Dinner

turning restaurant waste into natural glazes

"dinner 01 X Callao", 26/05/26, The Hague — © photo by Michał Betta

A designer explores materials locally sourced from the Netherlands, turning restaurant waste into natural glazes for ceramics and creating dinners that reflect on circularity between food, craft, and community.

materials left on the table

A Trace of Dinner began with my curiosity about where the materials in my pottery practice come from. After gathering my own clay from Wageningen "beach" and from Tegelen at the Maas River, I turned my attention to glazes. Extensive research into their ingredients revealed how much energy their transportation consumes, so I started searching for an alternative. As a food lover, I realized one evening after dinner with friends that everything I needed to create a glaze was already left on the table. That's where this journey began: reaching out to dozens of local restaurants, chefs, food suppliers, vendors, potters, and designers; collecting and processing waste; and researching materials until I had built an archive ready for glazing.

back to the restaurant

I wanted these materials to return to the restaurant environment and take on a new life there. Together with Restaurant Callao, Flora Cafe, and Bistro Goeswijn, we explored ways to design menus attuned to the possibilities of glazing, using as little energy as possible. The goal was a dinner that was as zero-waste as possible—while the ceramics themselves became storytellers, reflecting how we consume our materials, food, ingredients, and tableware.

the power of collaboration

In the end, much of A Trace of Dinner turned out to be about building collaboration. A local network of people from the restaurant, ceramics, and design worlds became active participants in a circular system, gradually forming the scaffolding of my work. Their involvement became central to the project, and I remain deeply grateful for their trust and collaboration. Circularity revealed itself as much a question of social relations as a way of understanding how one industry's waste can become another's treasure.

About Zizi Mitrou

Zizi Mitrou is an architect and designer with a focus on materiality, local sourcing, and conversation as a method for research, exchange, and making. Her practice approaches material research as a process of reconnection — through testing, touching, and talking with people as ways of relearning what materials can do.

"dinner 01 X Callao", 26/05/26, The Hague — © photo by Michał Betta

"dinner 02 X Goeswijn ", 02/06/26, Leiden — © photo by Gabriella Lincoln

"dinner 02 X Goeswijn", 02/06/26, Leiden — © photo by Gabriella Lincoln

"dinner 03 X Flora", 03/06/26, The Hague — © photo by Gabriella Lincoln