How to colonize a system with no food production

There are a variety of ways you can get food in systems like this; generally combining as many as possible is the way to go, given how important food is in Endless Space.

• Build food planetary exploitations on the planets
• Bring a leveled-up administrator hero with the +food abilities (and ideally +production as well)
• Focus on building (or buying) system improvements that will give you food on those planets
• Buyout terraforms on the first planet you settle to get it to a food-producing type, so that it can support the rest of the system
• Explore available moons & build the system improvement that gives +3 food per person on explored moons

The Colonial Base (that you get for free when colonizing a system) provides +2 food to start with so your initial colonists don't immediately starve. ^{From a comment by Raven Dreamer}